﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp4
{
    public class ClassId
    {
        //公开类
      
            public string C1
            {
                get;set;
            
        }
        //静态类
        public static string School;
        internal string TearchName;
    }

    //密封类
    sealed class StudentId
    {
        public readonly string StudentID = "1433223";
    }
       
    

    
}
